Harrow



(No Model.) 7

LE ROY W. STEVENS.

HARROW.

No. 371,902. PatentedOctQlS, 1887.

UNITED rates PATENT Fries.

LE ROY \V. STEVENS, OF AUBURN, NEW YORK.

HARROW.

SPECIFICATION forming part of Letters Patent No. 371,902, dated October 18, 1887 Application filed July 18, 1887. Serial No. 244,669.

(No model.)

this instance as attached to the depressed portions of the bars. The form of the bars between the said depressed portions is immaterial. Two different forms are shown in Figs. 2 and 3; but I do not limit myself to the forms shown.

It will be seen that the spaces between the depressed portions of the bars form clearancepassages,through which sods, earth, or stones on the surface of the ground will pass freely through the harrow,aud that the accumulation of such materials beneath the same, or the clogging of the harrow, is almost entirely prevented. Itwill also be seen that the depressed portions of the frame form guards for the teeth .and come in contact with loose materials before the teeth and tend to throw them to one side, and in case of immovable obstructions they first come in contact with them and tend to throw the teeth and harrow to one side or to raise the same over the obstacle, thereby lessening or-avoiding the strain upon the teeth.

The guards for the teeth extend upwardly and outwardly from the seat of the tceth,and, being made of bars,they will permit [inc dirt or soil to pass through them above the seats for the teeth. The construction of the frame also gives it great strength to resist upward deflection of its parts, but gives it elasticity in the plane of the frame, which serves to relieve the teeth from strain when brought in contact with immovable obstructions.

In Fig. 4 I show a form which I may give to the cross-bars B, the extent of elevation of said bars increasing gradually between the points of depression from front to rear,so that if the cross-bar comes in contact with any ob ject upon the ground or obstruction embedded therein as the harrow is drawn forward, an increased space is given it to pass under the said bar, thereby giving a more effective clearance. This gives additional protection from clogging.

WVhat I claim, and desire to secure by Letters Patent, is-- 1. In a harrow, the combination of draft bars with cross-bars intersecting each other, said bars having at certain points of their length portions depressed below the level of the main portions thereof, substantially as do scribed. Y

2. A harrow having draft and cross bars in T aZZ whom it may concern.-

Be it known that I, LE ROY \V. STEVENS,

of the city of Auburn, New York, have in vented certain new and useful Improvements 5 in I-Iarrows, of which the following is a description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a perspective view of my improved harrow, and Figs. 2, 3, and 4 are views showing modifications of form of the harrowframe bars.

In harrows made according to known methods of construction the entire or a large portion of the frames of the same are made in one general level, and such portions rest upon the ground or in close proximity thereto.

This is objectionable, as it increases the draft of the harrow when in contact with the earth,

and in all cases renders the same liable to be clogged by stubble, stones, sod, or earth, in a manner well known.

The object of my invention is to avoid these objections by providing a construction which will come in contact with the earth only at isolated points,and which will provide clearancespaces between these points,whcreby the liability to clog is reduced or wholly avoided and the draft of the harrow reduced to a minimum. These objects I accomplish by the construction shown in the drawings, in which the harrow-frame is composed of bars, prefcr- 5 ably of iron or steel, which intersect each other at certain points and are rigidly attached to each other at such points of intersection. These bars are provided at certain portions'of their length with depressed portions, to which the teeth of the harrow are preferably connected.

In the drawings the harrow is shown as composed of two frames hinged together; but I do not limit myself to this construction, as my improvements may be applied to other forms of frames.

Each of the frames shown in the drawings is composed of bars A, which are termed draftbars, and another set or series of bars, B,angularly intersecting the first-named bars, which are denominated cross-bars. At the points of intersection the bars are depressed below the level or horizontal plane of the other portions of the bars. The harrow-teeth are shown in tersecting each other, said bars having porsaid depressed portions, substantially as detions depressed below their main portions,and scribed.

barrow-teeth attached to said bars, substan- 4. A harrow having teeth-guards extending tially as described. upwardly and outwardly from the seat for the 5 3. In a harrow, the combination,with draftteeth, substantially as described.

.bars and cross-bars intersecting each other and having portions at the points of intersection LE ROY STEVENS depressed below the main portions of the bars, Witnesses: the elevated portions of said cross-bars being FREDERICK I. ALLEN, 1o inclined upwardly from front to rear between R. L. DRUMMOND. 

